Short-term operating reserve (STOR)

Short-Term Operating Reserve (STOR) is National Grid's most important source of reserve energy. Sites are paid for being ready to respond to a STOR event (availability) and for delivered energy (utilisation).

Participating assets are deployed via Flexitricity’s control room to either increase generation or reduce demand, when National Grid needs reserve energy to help them respond to any unexpected mismatch in supply and demand.

STOR is suitable for a wide variety of assets, and Flexitricity has the portfolio needed to choose the best commercial approach for each.

  • Combined heat and power (CHP) engines and heat pumps;
  • Standby generators (abated if required under the MCPD regulations); and
  • Flexible load (lighting, industrial processes, HVAC, refrigeration, etc.).

Sites are paid for delivered energy (utilisation), and depending on the contract type, may also be paid for being ready to respond to a STOR event (availability).

Note: fast-responding assets like batteries can participate in STOR; however, they can earn more revenue from providing frequency response, or trading in the wholesale markets and the Balancing Mechanism.

What we do:

  • We handle National Grid’s STOR procurement processes.
  • National Grid procures STOR through tender rounds held around six times a year. We work closely with each site to determine for how many hours and when they wish to make their assets available.
  • Our large portfolio enables optimal aggregation of customer assets to achieve the best price combination.
  • Flexitricity ensures revenue agility by offering access to the full range of energy market opportunities.
  • We provide continuous remote monitoring and a direct line to our manned control room, 24 hours/day.

Our STOR credentials:

  • Flexitricity is the most experienced STOR aggregator in Britain.
  • Our unmatched experience in this market has enabled us to maximise STOR revenue for the sites in our portfolio for 12+ years.
  • Flexitricity has been successful in every tender round since STOR was launched.

Get in touch today

Book a call with one of our energy market specialists to find out if you can participate and how much your site could earn.

0131 221 8100

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Flexitricity fully transitioned to Covid-19 operational status before the lockdown.  We have robust contingency plans in place to ensure the continuation of our 24/7 operations. Click here for more information.